Tool holder



Patented dan. Z? i923.

'i :an: A wat: n 1 fr?. i

kToon HOLDER.

Annerl-ritirare@ naar 1o, reale. sesam; regata To all whom t maycondom.' y i Be it known that I, Ancien-''. Girssiin, citizen of theUnited States, residing at Y 'ungstowin in the [county of Mahoning andState of GhiO, havein'ventbd certain new and useful Improvements in IoolHolders, of which the following is a specification. l

This invention 'relates to tool holders especially adapted for use onlathes. l

in important object of this invention is to provide. a tool.lio'lder'ihaving' novel means whereby a cutter may be securely andpositively held in position therebyforfproduca smooth and accurate outlin connection with the commutatorand other work.

A further object is to provide a tool holder of the class describedwhich is of highly simplied construction, durable in use and cheap tomanufacture.

Other objects and advantages of the invention will be apparenti duringthe course of the following description.

In the accompanying drawing forming a part of this application andinwhich like numerals are employed to designate like parts throughout thesame,

Figure l is a perspective of the improved tool holder.

Figure 2 iS a longitudinal sectional view through the same.

Figure 3 is a fragmentary view illustrating the means for holding theadjusting worm against endwise movement.

In the drawing wherein for the purpose of illustration is shown apreferred embodiment of the invention the numeral 5 designates a barbent -intermediate its ends as indicated at 6 to provide an attachingportion 7 adapted to be connected with the post 8 ofa lathe 9 of anydesired type.

In carrying out the invention, the forward portion of the bar isprovided with a head 10 having means whereby to securely and positivelyhold the cutter ll in position so that the forward end 11 of the samewill be held in engagement with the work such as a commutator. By reasonof the elongated formation of the cutter il the forward end ll of thesame may be positioned within the commutator for accurately making thedesired cut. The cutting lip ll at the forward end of the cutter isprovided by extending the forward portion of the cutter angularly andbeveling the "teds.- the worm isdesignated" the numeral ,19

end to' a point as-'illustrated in F igu'reA l.

, i The li'eady 10 is 'as illustrated ing is providedwith a centrallyarranged opening through y a tubfu'lar worin 18 ex- Ihe opening. forthe-recep'tionfof and thewallsv of the are provided A with* ppsitely'yarranged" recessesv 2O for 'the' reception of racks 22 of which thereare2. With reference to Figure 2 it will be seen that when the worm isrotated in the proper direction, the racks 22 will loe moved intoengagement with the tool and as .is well known a longitudinal strain onthe racks 22 will not cause the worm lto rotate. It is thus seen thatthe tool holding means are self locking.

The worm 18 is held against endwise movement in one direction by a pairof oppositely arranged arcuate shoulders 26 formed at opposite sides ofthe opening 19. The worm is held against endwise move- LItwill be seenwithI referenceto Figure 2v that 1the upper longitudinal edge' portioiniof the biaru provided with a `groove 14 whichi's substantially V-shapedin cross sec- 't'ionfor providing av seat'for the. rear 'pfor-v vtion ofthe bar.

ment in they other direction by the vcover plate 2'( which may besecured to the overhanging portion of the head l0 by means of fasteningdevices 28.` The wormlS is provided with a rearwardly extending tubularportion 30 throughl which a'handle `32 is extended.

In positioning the toolthey same is placed upon the seat formed by theV-shaped. rgroove and the racks 22 are now advanced. for securely and`positively holding the tool in position. When desired, the vracks maybe released from locking engagement with the tool by a rotation oftheworm 18 in the.

proper direction.

The invention 1s especially adapted for use in connection withcommutator and other work and by reason of the .formation of the tool itmay be readily inserted into the commutator for making an annular orother desired cut.

I claim :-v

l. A tool holder comprising a bar, a head carried thereby and having anoverhanging portion provided with an opening, the wall.

of which is provided with oppositely ar- 'ranged recesses, a Worinarranged in said opening,` and racks arranged in said recesses andengaged by said Worm, the Worm 'constitutingthe sole' meansy foractuating the racks and for locking the` saine in engagement With atool.

2. A tool holder comprising a bar, a head carried thereby 'and having anoverhanging portion provided With an opening, the Wall Vof which isprovided- With oppositely ar,

ranged recesses, a Worm arranged'in said opening, and racks arranged insaid recesses i :ing portion and limiting the endvvise mo-veand engagedbysaid Worm, the Worm constituting the sole means for actuating the mentof the Worml in the other direction. t a. A'tool holder comprising a barhaving a tool supporting seat extendinglongitudinally thereof7 a headconnected to one terminal portion of said bar and having an overhangingportion provided with an opening, a Worm arranged in said opening, saidoverhanging portion being provided With a pair ot arcuate inwardlyextending shoulders limiting` the endwise movement of said Worm in onedirection', racks carried by said overhanging portion and engaged bysaid Worm, a cover plate connected to said overhanging portion andlimiting the yendwise movement of thev Worm in the other direction, atool mounted on said seat and engaged by said racks, said Wormconstituting the sole means oractuating said racks and for locking thesame in engagement With said tool, the rear end of said Worm beingextended exteriorly oi the head, anda handle connected to saidrearwardly extending portion of the Worm.

In testimony whereof, I havel aiiixed my signature in the presence oftvvo Witnesses.

I ANTON A. GASSER. Witnessesz Y l/V. Gr.y DoRNAN, ALrRnDA PIFERJ

